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Single-component polyurethane grouting material foamed when meeting water, and preparation method and application thereof

A technology for foaming polyurethane and grouting materials, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of shrinkage of the consolidated body, unsatisfactory secondary water blocking effect, etc., and achieve good adhesion and marketization prospects. Good results

Inactive Publication Date: 2017-06-20
SHANGHAI DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a single-component water-repellent foaming polyurethane in order to overcome the shortcomings of the prior art that the polyurethane grouting material shrinks with the evaporation of water, and the consolidation body shrinks, and the secondary water blocking effect is not ideal. Grouting material, preparation method and application thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] TDI-80: 33g

[0035] Hydrophilic polyether polyol DJ-11: 100g

[0036] Acetone: 14g

[0037] Tween 80: 1.5g

[0038] N-Methylmorpholine: 0.14g

[0039] Diethyl phthalate: 7g

[0040] The reaction was carried out in a glass reactor equipped with a stirrer, a thermocouple thermometer and a calcium chloride drying tube. Put the hydrophilic polyether polyol DJ-11, 100g (trihydric alcohol with a number average molecular weight of 5000) into the reactor, raise it to 100±2°C, stir, vacuumize (vacuum degree greater than 0.1MPa) for dehydration and degassing 3 hour, cool down to 50±2°C, then add 33g of TDI-80, react for 3 hours at a reaction temperature of 80±2°C, add acetone, Tween 80, N-formazol according to the formula after cooling down to 50±2°C The base morpholine and diethyl phthalate are fully stirred and mixed (the speed of stirring and mixing is 60 rpm) for 30 minutes to obtain the polyurethane grouting material. Its properties are as follows: solid content (%): ...

Embodiment 2

[0042] MDI-50: 80g

[0043] Hydrophilic polyether polyol DJ-12: 100g

[0044] Butanone: 27g

[0045] Water-soluble silicone oil: 5g

[0046] N-Methylmorpholine: 0.9g

[0047] Dioctyl phthalate: 18g

[0048]The reaction was carried out in a glass reactor equipped with a stirrer, a thermocouple thermometer and a calcium chloride drying tube. Put 100g of hydrophilic polyether polyol DJ-12 (trihydric alcohol with a number average molecular weight of 7000) into the reactor, raise the temperature to 100±2°C, stir, vacuumize, dehydrate and degas for 3 hours, and cool down to 50±2°C. Then add 80g of MDI-50, react at a reaction temperature of 80±2°C for 3 hours, cool down to 50±2°C and add butanone, water-soluble silicone oil, N-methylmorpholine, phthalic acid according to the formula The dioctyl ester is fully stirred and mixed with each component (the mixing speed is 80 rpm) for 40 minutes to obtain the polyurethane grouting material. Its properties are as follows: solid conten...

Embodiment 3

[0050] TDI-80: 25g

[0051] MDI-50: 25g

[0052] Hydrophilic polyether polyol DJ-21: 100g

[0053] Acetone: 8g

[0054] Butanone: 10g

[0055] Tween 80: 3g

[0056] N-ethylmorpholine: 0.45g

[0057] Diethyl phthalate: 8g

[0058] Dioctyl phthalate: 4g

[0059] The reaction was carried out in a glass reactor equipped with a stirrer, a thermocouple thermometer and a calcium chloride drying tube. Put 100g of hydrophilic polyether DJ-21 (tetrahydric alcohol with a number average molecular weight of 5000) into the reactor, raise it to 100±2°C, stir, vacuumize and dehydrate for 3 hours, cool down to 50±2°C, and then Add 25g of TDI-80 and 25g of MDI-50, and react for 3 hours at a reaction temperature of 80±2°C. After cooling down to 50±2°C, add acetone, methyl ethyl ketone, Tween 80, and N-ethylmorpholine according to the formula , diethyl phthalate, and dioctyl phthalate were fully stirred and mixed (the speed of stirring and mixing was 75 rpm) for 35 minutes to obtain a pol...

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Abstract

The invention discloses a single-component polyurethane grouting material foamed when meeting water, and a preparation method and an application thereof. The invention provides the preparation method for the single-component polyurethane grouting material foamed when meeting water, wherein the preparation method comprises the following steps: step 1, carrying out a polymerization reaction of hydrophilic polyether polyol and an organic polyisocyanate compound, to obtain a polyurethane prepolymer, wherein the hydrophilic polyether polyol has the functionality degree of 3-4 and the number-average molecular weight of 5000-7000; and step 2, stirring and mixing the polyurethane prepolymer obtained in the step 1 with an organic cosolvent, a surfactant, a catalyst and a plasticizer, to obtain the single-component polyurethane grouting material foamed when meeting water. The polyurethane grouting material forms elastic foams after being reacted when meeting water, after water is volatilized, the polyurethane grouting material is naturally shrunk to a certain extent, the foam bodies are still intact, the polyurethane grouting material can absorb water to swell when meeting water again, and a secondary water plugging effect is achieved; therefore, the polyurethane grouting material can rapidly plug water, is foamed when meeting water, and has good cohesiveness and good marketization prospects.

Description

technical field [0001] The invention relates to a single-component water-repellent foaming polyurethane grouting material, a preparation method and an application thereof. Background technique [0002] Polyurethane grouting material is a new material that uses polyurethane resin in civil engineering to play the role of reinforcement, water blocking and anti-seepage. As a new polymer organic particle-free fast-setting chemical grouting material, polyurethane grouting material is a high-efficiency material for anti-seepage and plugging. Polyurethane grouting materials include hydrophilic polyurethane grouting materials and hydrophobic polyurethane grouting materials. [0003] The conventional hydrophilic polyurethane grouting material has the characteristics of good hydrophilicity, rapid reaction with water, forming a consolidated body with certain elasticity; large amount of water, which can reach 15-20 times, etc., and plays a very good role in rapid water blocking It is w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/76C08K5/12C09K3/12C08J9/12
CPCC08G18/4829C08G18/7614C08G18/7671C08J9/125C08J2375/08C08K5/12C09K3/12
Inventor 马立青杨林超杜辉郭东雷王振波董建国
Owner SHANGHAI DONGDA CHEM
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